<!DOCTYPE html>
<html>
	<head>
		<meta charset="UTF-8">
		<title></title>
		<script src="jquery-3.2.1.min.js"></script>
		<script>
			$(function(){
				 $("#btnBook").click(function(){
				 	if(this.value=="hidden")
				 	{
				 		$("#book").hide();
				 		this.value="show";
				 	}else{
				 		$("#book").show();
				 		this.value="hidden";
				 	}
				 	
				 });
				 
			});
		</script>
	</head>
	<body>
		<img src="../day11/images/mai.jpg" id="book"/>
		<input type="button" value="hidden" id="btnBook"/>
	</body>
</html>
